At present , people are faced with proliferate data which provide favorable conditions for establishes of data warehouse . at present , data base management system can succeed in realizing record modification and query . with the rapid increase of data , , query and stat ca n ' t meet practical need and find relation of data so that : knowledge is lacked 与日趋成熟的数据管理技术与软件工具相比,人们所依赖的数据分析工具功能,却无法有效地为决策者提供其决策支持所需要的相关知识,从而形成了一种“丰富的数据,贫乏的知识”之独特的现象,人们迫切需要有新的有效手段对这些数据进行分析,数据挖掘方法就是为满足这种需求而产生并迅速发展起来的。
The basic data base of village and town during 1985 - 2000 is established by data base management system . through the exclusive spacial analysis function , spacial data base and attribute data base are mated into a spacial - attribute - unified data base . then the spacial evolution maps and dynamic type map of pred system are formed , and spacial difference and evolution law are further studied 应用gis建立全县乡镇级行政区划空间数据库,并借助数据库管理系统( dbms )建立1985 2000年全县分乡镇pred系统基础数据库,应用gis特有的空间分析功能,将相关的空间数据与属性数据进行匹配处理,建立“空间?属性一体化数据库” ,在此基础上,生成pred系统空间演变图、动态类型图,并进一步分析其空间分异及演变规律。
System have two database , one is main memory database in front ; other is oracle data base management system in back . this not only satisfies the request of in - line monitoring , but also actualizes the management to data . focusing the diagnose function , paper actualizes design of main memory database and faults diagnose expert system and background database with java language which is independent of operating system and is oriented to object 系统具有以下特点: 1 、充分利用巡回监测装置采集的数据和瞬时转速诊断技术的特点,采用简洁实用的硬件结构,构建在线故障诊断系统; 2 、采用两种触发方式进行故障推理,实现自动分析诊断和交互诊断相结合的诊断模式; 3 、设计内存数据库作前端、 oracle数据库平台作后端的双数据库模式,系统既满足实时监测的要求,又实现了数据管理的功能。